Segmental brake-shoe.



H. JONES.

SEGMENTAL BRAKE SHOE.

APPLICATION rum; 0012a, 1914.

Patented Wang 1915.

ED s'rn'rns PATENT osmos- HARRY JONES, OF SUFFEB-N, YORK, ASSIGNOR T AMERICAN BRAKE SHOE 6a FOUNDRY COMPANY, .OF MAHWAH, NEW JERSEY, A CORPQBATION OF NEVJ JERSEY.

SEGMENTAL BRAKE-SHOE.

Specification of Letters Patent.

Patented Mar. 2, 1915.

To all whom it may concern Be it known that I, HARRY Jones, acitizen-of the United States, and a. resident of Sufl'ern, in the] county of Rockland and State of New York, have made and invented certain new and useful Improvements in Segmental Brake-Shoes, of which the following is a specification.

My invention relates to an improvement in'brake shoes, and more articularly to such as have been termed seg ental shoes, that is, a-shoe wherein the cast metal body or wearing portion is provided with a plurality of grooves extending iron the wearing face substantially to the back of the shoe, in order toavoid the' distortion of the shoe when heated by frictional contact with the tread of a wheel. Shoes made in this way are liable to be cracked. or broken during handling and transportation by reason of the fact that the slotted body is apt to be distorted or straightened out, the slots or grooves permitting the undue separation of the segments and thereby causing the metal at the back of the shoe to crack or break and possibly become detached from the reinforcmg back usuall employed in connection with this type 0 shoe.

The-object of my invention is to overcome this danger and to so form the slots, grooves or recesses in the body that but a slight sep aration of the adjacent segments is permitted, the slotsbeing of such formation that the adjacent segments are interlocked, and prevented from separating to that ex tent will permit or allow the shoe to be so straightened out or distorted to an extent likely to permanently injure or destroy the shoe.

lVith this and other ends in View, my invention consists in certain novel features of construction and combinations of parts as will be hereinafter fully described and pointedout in the claims.

or key lug 6, and with end stops 7. In the shoe is also embedded, at or adjacentto the hack thereof, a. reinforcing plate'or member 8.

The cast metal body of the shoe is provided with a plurality of slots 9, extending from the wearing face of the shoe to, or substantially to, the reinforcing"plate .8, these slots being of the peculiar formation as illustrated in 1 .of the drawings; that is, instead of the slots extending'directly across the body of the shoe, they are such as to form a lock or key 10', the vertical walls'or sides of the lock being'dove-tailed or undercut, forming shoulders 11 on one segment, and corresponding shoulders 12 on the other segment of the shoe, the walls or sides of these recesses or grooves being sub- The result stantially parallel throughout. of this formation is that any tendency to straighten the shoe out will bring the shoulders 11 of one section or segment against the shoulders 12 of the adjacent section and .preventing anything more than 9. slight straightening of the shoe, not sufiicient, however, to permit of the cracking or breaking it should be understood that such is for illustrative purposes only, and not that these grooves or recesses may not be formed in other ways or; of other shapes. In fact, these grooves may take a variety of shapes without departing from the effectiveness of the device, it being necessary only that they be of such shape to form in eilect a key on one segment fitting in (1- corresponding recess in the wall of the adjacent segment, so that the two segments will interlock when slightly separated.

In the molding of shoes constructed like the foregoing, I prefer to use cores in the mold for the formation of the slots fl, these cores to be made of vitrified clay, or burned firecley, and permitted to remain the slots until the shoe goes into servicef'lfhe slot 9 in theshoe, at the extreme left of Figs,

'ith a core 13, it being understood, however, that the core may be removed upon the completion of the castings.- By permitting it to remain, however, until the shoe goes into service, it will assist in preventing any tendency of the shoe to be straightened out While in the tumbling barrel, or while being loaded or unloaded during transportation. the core of course readily disintegrating and falling out of the slot after the shoe has been put into service, and thus giving to the shoe the desired flexibility.

What I claim is 1. A brake shoe comprising a body having a groove extending from the wearing face to substantially the back of said shoe, said groove being of such a. shape as to form interlocking segments.

2. A brake shoe comprising a body formed with a plurality of transverse grooves separating the same into a plurality of seg ments, said grooves forming locking men!- bersin the adjacent sections to prevent the latter from being separated.

3. A brake shoe comprising a body formed with a plurality of grooves extending from the wearing face to substantially the back of the shoe, and forming a plurality of seg-. ments, said grooves being of such shape as to form a key on one segment fitting into a corresponding recess formed in the adjacent section whereby to prevent the separation of said segments.

4'. Abrake shoe comprising a body having a groove extending from the wearing face to substantially the back of said shoe, said groove being of such shape as to form, when devoid of a core, interlocking segments and containing a core capable of disintegration while the shoe is in service.

5. A. brake shoe comprising a body formed with a plurality of grooves extending from the wearing face into the body of said shoe, said grooves being of such shape as to form, when devoid of a. core. locking members in the adjacent sections. and containing a clay core.

Signed at Sufiern, land and State of New of October, A. D. 19 L41.

HARRY JONES.

.in the county of Rock- York, this 21 day lVit-nesses OLIVE H. Don eMUs, J. A. Dnvrosov, 

